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Discriminative learning of similar objects enhances memory for the objects and contexts

How to improve our episodic memory is an important issue in the field of memory. In the present study, we used a discriminative learning paradigm that was similar to a paradigm used in animal studies. In Experiment 1, a picture (e.g., a dog) was either paired with an identical picture, with a simila...

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Detalles Bibliográficos
Autores principales: Zhou, Wenxi, Chen, Haoyu, Yang, Jiongjiong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Cold Spring Harbor Laboratory Press 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6239131/
https://www.ncbi.nlm.nih.gov/pubmed/30442768
http://dx.doi.org/10.1101/lm.047514.118
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author Zhou, Wenxi
Chen, Haoyu
Yang, Jiongjiong
author_facet Zhou, Wenxi
Chen, Haoyu
Yang, Jiongjiong
author_sort Zhou, Wenxi
collection PubMed
description How to improve our episodic memory is an important issue in the field of memory. In the present study, we used a discriminative learning paradigm that was similar to a paradigm used in animal studies. In Experiment 1, a picture (e.g., a dog) was either paired with an identical picture, with a similar picture of the same concept (e.g., another dog), or with a picture of a different concept (e.g., a cat). Then, after intervals of 10 min, 1 d, and 1 wk, participants were asked to perform a 2-alternative forced-choice (2AFC) task to discriminate between a repeated and a similar picture, followed by the contextual judgment. In Experiment 2, eye movements were measured when participants encoded the pairs of pictures. The results showed that by discriminative learning, there was better memory performance in the 2AFC task for the “same” and “similar” conditions than for the “different” condition. In addition, there was better contextual memory performance for the “similar” condition than for the other two conditions. With regard to the eye movements, the participants were more likely to fixate on the lure objects and made more saccades between the target and lure objects in the “similar” (versus “different”) condition. The number of saccades predicted how well the targets were remembered in both the 2AFC and contextual memory tasks. These results suggested that with discriminative learning of similar objects, detailed information could be better encoded by distinguishing the object from similar interferences, making the details and the contexts better remembered and retained over time.
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spelling pubmed-62391312019-12-01 Discriminative learning of similar objects enhances memory for the objects and contexts Zhou, Wenxi Chen, Haoyu Yang, Jiongjiong Learn Mem Research How to improve our episodic memory is an important issue in the field of memory. In the present study, we used a discriminative learning paradigm that was similar to a paradigm used in animal studies. In Experiment 1, a picture (e.g., a dog) was either paired with an identical picture, with a similar picture of the same concept (e.g., another dog), or with a picture of a different concept (e.g., a cat). Then, after intervals of 10 min, 1 d, and 1 wk, participants were asked to perform a 2-alternative forced-choice (2AFC) task to discriminate between a repeated and a similar picture, followed by the contextual judgment. In Experiment 2, eye movements were measured when participants encoded the pairs of pictures. The results showed that by discriminative learning, there was better memory performance in the 2AFC task for the “same” and “similar” conditions than for the “different” condition. In addition, there was better contextual memory performance for the “similar” condition than for the other two conditions. With regard to the eye movements, the participants were more likely to fixate on the lure objects and made more saccades between the target and lure objects in the “similar” (versus “different”) condition. The number of saccades predicted how well the targets were remembered in both the 2AFC and contextual memory tasks. These results suggested that with discriminative learning of similar objects, detailed information could be better encoded by distinguishing the object from similar interferences, making the details and the contexts better remembered and retained over time. Cold Spring Harbor Laboratory Press 2018-12 /pmc/articles/PMC6239131/ /pubmed/30442768 http://dx.doi.org/10.1101/lm.047514.118 Text en © 2018 Zhou et al.; Published by Cold Spring Harbor Laboratory Press http://creativecommons.org/licenses/by-nc/4.0/ This article is distributed exclusively by Cold Spring Harbor Laboratory Press for the first 12 months after the full-issue publication date (see http://learnmem.cshlp.org/site/misc/terms.xhtml). After 12 months, it is available under a Creative Commons License (Attribution-NonCommercial 4.0 International), as described at http://creativecommons.org/licenses/by-nc/4.0/.
spellingShingle Research
Zhou, Wenxi
Chen, Haoyu
Yang, Jiongjiong
Discriminative learning of similar objects enhances memory for the objects and contexts
title Discriminative learning of similar objects enhances memory for the objects and contexts
title_full Discriminative learning of similar objects enhances memory for the objects and contexts
title_fullStr Discriminative learning of similar objects enhances memory for the objects and contexts
title_full_unstemmed Discriminative learning of similar objects enhances memory for the objects and contexts
title_short Discriminative learning of similar objects enhances memory for the objects and contexts
title_sort discriminative learning of similar objects enhances memory for the objects and contexts
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6239131/
https://www.ncbi.nlm.nih.gov/pubmed/30442768
http://dx.doi.org/10.1101/lm.047514.118
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